Uploading pdf file in base64 with API

Hi,

I'm trying to upload a pdf file with the API. I have the content in base64 format. 

The file is created and added to the ticket, but Adobe Acrobat can't open it after download. The error says the file is corrupted. 

The upload API is called with Content-type = "application/pdf;base64". I tried other content-types with the same result. 

Any idea ?

Thanks